How do you close a mesh

Question

I'm attempting to make a mesh from a point cloud but every time I use Poisson surface reconstruction, it doesn't create a full solid, it leaves the bottom open. I've run out of ideas on how to fill the rest of the area. I would like to 3D print this but it won't import anywhere unless it's a full solid.

Answer 1

Use the filter Close holes (located in the menu Filters->Remeshing, Simplification and Reconstruction) and increase the default value of parameter Max size to be closed